Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
WINDER-SORTER
The experimental winnowing machine-sorter is designed for selection work. The winnowing machine body is made of pine beams, to which the side plywood walls are attached. The beams are...
ATV FOR ALL SEASONS
Before proceeding to the description of the snowmobile "Turtle-2", will tell about the history of his birth. And it happened thanks to the ATV — the predecessor of the same name, only...
